Door-latch



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UNITED STATES PATENT OEEIcE.

PHILIP MATHES, OF IDLEWOOD, PENNSYLVANIA.

DOOR-LATCH.

SPECIFICATION forming part of Letters Patent No. 232,529, datedSeptember 2.1, 1880.

Appncatin inea Aprilae, Isso. (Model.)

To all whom it 'may concern:

Be it known that I, PHILIP MATHEs, ot' Idlewood, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Door-Latches; and I do hereby declare the following `tobe a full, clear, and exact description thereof, reference being had tothe accompanying drawings, forming a part of this specification, inWhich- Figure lis a side view of my improved latch, the `side platebeing` removed. Fig. 2 is a scctional view, and Figs. 3 and 4 are detailviews.4

Like letters of reference indicate like parts in each.

My improved latch belongs to that class having a sliding bolt operatedby a knob and a locking device operatedbynthe rotation of the knob t0lock the latch either open or closed.

To enable others skilled in the art tol-make and use my invention, Iwill now describe its construction and manner ot' use.

I provide a case, a, of the usual construction, having a sliding latch,b, operated by a knob, c, which has a shaft, d, projecting and operatingthrough a slot, e, in the faceplate. The latch has a tail-piece, f,which is provided with an abutment, f', which presses against theopposite side of the lock and prevents the lateral displacement of thelatch. Guides gare cast upon the case to prevent the verticaldisplacement of the latch. The latch is held out by means of the springh, one end of which is connected to apin, h', on the case, and the otherto a pin, h2, on the tail-piece f. The shaftcl projects through a hole,f, in the latch b. Extending at right angles across the rear end of thelatch b is a plate, i, provided with an end piece, t', and corner-piecesi2. The end piece i is recessed for the passage of the' end of the boltk, which boltis recessed on the front side, as at k', and fits in aslot, d', which extends around two sides ot' the shaft d. Shoulders k2are formed in the recess 7c', against which the web d2 of the slottedportion ofthe shaft d operates to shoot and withdraw the bolt lc. Asteel spring, m, is placed back of the bolt k, its ends bearing againstthe cornerpieces 2 of the plate i, to hold the bolt 7c up against theshaft d. On the edge ot' the case is a stop or abutment, n, so placedwith relation to the bolt 7c that when the latch b is out the turningot' the knob c will cause the bolt k to be shot in front of it, as shownin Fig. l, and thereby secure the latch in a locked position. The latchis secured in an open position by pressing it back until the bolt passesthe abutment n and then turning the knob, so as to shoot the bolt backof the abutment.

It will be noticed that the parts which constitute the locking partofthe latch-to Wit, the plate z', shaft d, bolt 7c, and spring lm--areall separate, and require no attachment to each other. They are merelydropped in place When the latch is set up, and in case any ot' them arelost or broken they can be replaced Without trouble or necessitatingrepairs of other parts of the latch.

The advantages of my improvement are its great simplicity and cheapness,both of manufacture and otl setting up, its non-liability to get out oforder, and its certainty and security in holding the latch in an open orclosed position.

What I claim as my invention7 and desire to secure by Letters Patent,isi- The combination of the sliding latch b, the locking-bolt 7c,mounted and movable transversely on the sliding latch, the shaft d,slotted as at d', for operating both latch and bolt, the spring m, andlug a, substantially as and for the purposes specified.

In testimony whereof I, the said PHILIP MATHES, have hereunto set myhand.

PHILIP MATHES.

Witnesses:

J No. K. SMITH, J AMES H. PORTE.

